St. Mary’s Catholic Church / Potsdam, NY

A high-spirited place for technology to meet preservation

In 2010, stained glass was carefully removed from the pine windows, originally constructed in 1887. Marvin Windows and Doors’ Signature Products and Services group was contracted to replicate, in Honduran Mahogany, the 15 Gothic Revival windows, including a 15’ by 23’ rose window. After more than a century of weathering, shifting and settling, measurements for each new window needed to be exact to accommodate fixed stone and glass dimensions.

Jerry MacNeil Architects Ltd employed tacheometric survey software in combination with rectified photography to capture measurements digitally. BIM and CAD/CAM technology, cyber models, and cutter designs downloaded directly to Marvin’s CNC equipment allowed window fabrication to be a paperless process.

Project Highlights

  • The rose window, constructed of 816 precisely cut and joined components, fir perfectly in the opening.
  • No two openings were alike, so a variety of state-of-the-art digital measuring techniques were used to create a precise fit - as well as full-size frame rubbings and glass tracings.
  • Honduran mahogany was used in all windows for longevity and stability.
  • A spirit of collaboration and pride filled the project, with workers signing the concealed edge of the windows per an old carpentry tradition from Europe.

Building Type

Historic renovation, church windows

Units and Applications

14 custom mahogany exterior and interior Gothic Revival wood window units, 3 at 70" x 216 1/2", 11 at 58" x 195". One 171" x 276 1/2" unit integrating a 14-ft.-diameter Rose Window set in a Gothic frame.


Jerry MacNeil Architects Limited


J.T. Erectors

  St. Mary's Church

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